If a predefined string is missing, emit a warning and make it an empty

[mandoc.git] / roff.c

diff --git a/roff.c b/roff.c
index 43cf02574a8f7dbaa7f17709af4f5b940b52d1bd..92a4a9b37231f08c46ce673476ab7a21dc5c8f17 100644 (file)
--- a/roff.c
+++ b/roff.c
@@ -1,4 +1,4 @@
-/*     $Id: roff.c,v 1.129 2011/03/22 09:50:11 kristaps Exp $ */
+/*     $Id: roff.c,v 1.142 2011/05/26 11:58:25 kristaps Exp $ */

 /*
  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
 /*
  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>


@@ -20,22 +20,17 @@
 #endif
 
 #include <assert.h>
 #endif
 
 #include <assert.h>

-#include <errno.h>

 #include <ctype.h>
 #include <ctype.h>

-#include <limits.h>

 #include <stdlib.h>
 #include <string.h>
 #include <stdlib.h>
 #include <string.h>

-#include <stdio.h>

 
 #include "mandoc.h"
 #include "libroff.h"
 #include "libmandoc.h"
 
 
 #include "mandoc.h"
 #include "libroff.h"
 #include "libmandoc.h"
 

+/* Maximum number of nested if-else conditionals. */

 #define        RSTACK_MAX      128
 
 #define        RSTACK_MAX      128
 

-#define        ROFF_CTL(c) \
-       ('.' == (c) || '\'' == (c))
-

 enum   rofft {
        ROFF_ad,
        ROFF_am,
 enum   rofft {
        ROFF_ad,
        ROFF_am,


@@ -66,7 +61,7 @@ enum  rofft {
        ROFF_EQ,
        ROFF_EN,
        ROFF_cblock,
        ROFF_EQ,
        ROFF_EN,
        ROFF_cblock,

-       ROFF_ccond, /* FIXME: remove this. */
+       ROFF_ccond,

        ROFF_USERDEF,
        ROFF_MAX
 };
        ROFF_USERDEF,
        ROFF_MAX
 };


@@ -130,6 +125,14 @@ struct     roffmac {
        struct roffmac  *next;
 };
 
        struct roffmac  *next;
 };
 

+struct predef {
+       const char      *name; /* predefined input name */
+       const char      *str; /* replacement symbol */
+};
+
+#define        PREDEF(__name, __str) \
+       { (__name), (__str) },
+

 static enum rofferr     roff_block(ROFF_ARGS);
 static enum rofferr     roff_block_text(ROFF_ARGS);
 static enum rofferr     roff_block_sub(ROFF_ARGS);
 static enum rofferr     roff_block(ROFF_ARGS);
 static enum rofferr     roff_block_text(ROFF_ARGS);
 static enum rofferr     roff_block_sub(ROFF_ARGS);


@@ -147,7 +150,7 @@ static      const char      *roff_getstrn(const struct roff *,
 static enum rofferr     roff_line_ignore(ROFF_ARGS);
 static enum rofferr     roff_nr(ROFF_ARGS);
 static int              roff_res(struct roff *, 
 static enum rofferr     roff_line_ignore(ROFF_ARGS);
 static enum rofferr     roff_nr(ROFF_ARGS);
 static int              roff_res(struct roff *, 

-                               char **, size_t *, int);
+                               char **, size_t *, int, int);

 static enum rofferr     roff_rm(ROFF_ARGS);
 static void             roff_setstr(struct roff *,
                                const char *, const char *, int);
 static enum rofferr     roff_rm(ROFF_ARGS);
 static void             roff_setstr(struct roff *,
                                const char *, const char *, int);


@@ -201,6 +204,12 @@ static     struct roffmac   roffs[ROFF_MAX] = {
        { NULL, roff_userdef, NULL, NULL, 0, NULL },
 };
 
        { NULL, roff_userdef, NULL, NULL, 0, NULL },
 };
 

+/* Array of injected predefined strings. */
+#define        PREDEFS_MAX      38
+static const struct predef predefs[PREDEFS_MAX] = {
+#include "predefs.in"
+};
+

 static void             roff_free1(struct roff *);
 static enum rofft       roff_hash_find(const char *, size_t);
 static void             roff_hash_init(void);
 static void             roff_free1(struct roff *);
 static enum rofft       roff_hash_find(const char *, size_t);
 static void             roff_hash_init(void);


@@ -209,7 +218,6 @@ static      void             roffnode_push(struct roff *, enum rofft,
                                const char *, int, int);
 static void             roffnode_pop(struct roff *);
 static enum rofft       roff_parse(struct roff *, const char *, int *);
                                const char *, int, int);
 static void             roffnode_pop(struct roff *);
 static enum rofft       roff_parse(struct roff *, const char *, int *);

-static int              roff_parse_nat(const char *, unsigned int *);

 
 /* See roff_hash_find() */
 #define        ROFF_HASH(p)    (p[0] - ASCII_LO)
 
 /* See roff_hash_find() */
 #define        ROFF_HASH(p)    (p[0] - ASCII_LO)


@@ -235,7 +243,6 @@ roff_hash_init(void)
        }
 }
 
        }
 }
 

-

 /*
  * Look up a roff token by its name.  Returns ROFF_MAX if no macro by
  * the nil-terminated string name could be found.
 /*
  * Look up a roff token by its name.  Returns ROFF_MAX if no macro by
  * the nil-terminated string name could be found.


@@ -280,10 +287,6 @@ roffnode_pop(struct roff *r)
        assert(r->last);
        p = r->last; 
 
        assert(r->last);
        p = r->last; 
 

-       if (ROFF_el == p->tok)
-               if (r->rstackpos > -1)
-                       r->rstackpos--;
-

        r->last = r->last->parent;
        free(p->name);
        free(p->end);
        r->last = r->last->parent;
        free(p->name);
        free(p->end);


@@ -362,6 +365,7 @@ struct roff *
 roff_alloc(struct regset *regs, struct mparse *parse)
 {
        struct roff     *r;
 roff_alloc(struct regset *regs, struct mparse *parse)
 {
        struct roff     *r;

+       int              i;

 
        r = mandoc_calloc(1, sizeof(struct roff));
        r->regs = regs;
 
        r = mandoc_calloc(1, sizeof(struct roff));
        r->regs = regs;


@@ -369,6 +373,10 @@ roff_alloc(struct regset *regs, struct mparse *parse)
        r->rstackpos = -1;
        
        roff_hash_init();
        r->rstackpos = -1;
        
        roff_hash_init();

+
+       for (i = 0; i < PREDEFS_MAX; i++) 
+               roff_setstr(r, predefs[i].name, predefs[i].str, 0);
+

        return(r);
 }
 
        return(r);
 }
 


@@ -379,7 +387,7 @@ roff_alloc(struct regset *regs, struct mparse *parse)
  * is processed. 
  */
 static int
  * is processed. 
  */
 static int

-roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
+roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)

 {
        const char      *stesc; /* start of an escape sequence ('\\') */
        const char      *stnam; /* start of the name, after "[(*" */
 {
        const char      *stesc; /* start of an escape sequence ('\\') */
        const char      *stnam; /* start of the name, after "[(*" */


@@ -446,8 +454,9 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
                res = roff_getstrn(r, stnam, (size_t)i);
 
                if (NULL == res) {
                res = roff_getstrn(r, stnam, (size_t)i);
 
                if (NULL == res) {

-                       cp -= maxl ? 1 : 0;
-                       continue;
+                       /* TODO: keep track of the correct position. */
+                       mandoc_msg(MANDOCERR_BADESCAPE, r->parse, ln, pos, NULL);
+                       res = "";

                }
 
                /* Replace the escape sequence by the string. */
                }
 
                /* Replace the escape sequence by the string. */


@@ -476,16 +485,19 @@ roff_parseln(struct roff *r, int ln, char **bufp,
 {
        enum rofft       t;
        enum rofferr     e;
 {
        enum rofft       t;
        enum rofferr     e;

-       int              ppos;
+       int              ppos, ctl;

 
        /*
         * Run the reserved-word filter only if we have some reserved
         * words to fill in.
         */
 
 
        /*
         * Run the reserved-word filter only if we have some reserved
         * words to fill in.
         */
 

-       if (r->first_string && ! roff_res(r, bufp, szp, pos))
+       if (r->first_string && ! roff_res(r, bufp, szp, ln, pos))

                return(ROFF_REPARSE);
 
                return(ROFF_REPARSE);
 

+       ppos = pos;
+       ctl = mandoc_getcontrol(*bufp, &pos);
+

        /*
         * First, if a scope is open and we're not a macro, pass the
         * text through the macro's filter.  If a scope isn't open and
        /*
         * First, if a scope is open and we're not a macro, pass the
         * text through the macro's filter.  If a scope isn't open and


@@ -494,7 +506,7 @@ roff_parseln(struct roff *r, int ln, char **bufp,
         * no matter our state.
         */
 
         * no matter our state.
         */
 

-       if (r->last && ! ROFF_CTL((*bufp)[pos])) {
+       if (r->last && ! ctl) {

                t = r->last->tok;
                assert(roffs[t].text);
                e = (*roffs[t].text)
                t = r->last->tok;
                assert(roffs[t].text);
                e = (*roffs[t].text)


@@ -503,18 +515,18 @@ roff_parseln(struct roff *r, int ln, char **bufp,
                if (ROFF_CONT != e)
                        return(e);
                if (r->eqn)
                if (ROFF_CONT != e)
                        return(e);
                if (r->eqn)

-                       return(eqn_read(&r->eqn, ln, *bufp, *offs));
+                       return(eqn_read(&r->eqn, ln, *bufp, pos));

                if (r->tbl)
                if (r->tbl)

-                       return(tbl_read(r->tbl, ln, *bufp, *offs));
+                       return(tbl_read(r->tbl, ln, *bufp, pos));

                return(ROFF_CONT);
                return(ROFF_CONT);

-       } else if ( ! ROFF_CTL((*bufp)[pos])) {
+       } else if ( ! ctl) {

                if (r->eqn)
                if (r->eqn)

-                       return(eqn_read(&r->eqn, ln, *bufp, *offs));
+                       return(eqn_read(&r->eqn, ln, *bufp, pos));

                if (r->tbl)
                if (r->tbl)

-                       return(tbl_read(r->tbl, ln, *bufp, *offs));
+                       return(tbl_read(r->tbl, ln, *bufp, pos));

                return(ROFF_CONT);
        } else if (r->eqn)
                return(ROFF_CONT);
        } else if (r->eqn)

-               return(eqn_read(&r->eqn, ln, *bufp, *offs));
+               return(eqn_read(&r->eqn, ln, *bufp, ppos));

 
        /*
         * If a scope is open, go to the child handler for that macro,
 
        /*
         * If a scope is open, go to the child handler for that macro,


@@ -527,7 +539,7 @@ roff_parseln(struct roff *r, int ln, char **bufp,
                assert(roffs[t].sub);
                return((*roffs[t].sub)
                                (r, t, bufp, szp, 
                assert(roffs[t].sub);
                return((*roffs[t].sub)
                                (r, t, bufp, szp, 

-                                ln, pos, pos, offs));
+                                ln, ppos, pos, offs));

        }
 
        /*
        }
 
        /*


@@ -536,7 +548,6 @@ roff_parseln(struct roff *r, int ln, char **bufp,
         * the compilers handle it.
         */
 
         * the compilers handle it.
         */
 

-       ppos = pos;

        if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
                return(ROFF_CONT);
 
        if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
                return(ROFF_CONT);
 


@@ -570,7 +581,6 @@ roff_endparse(struct roff *r)
        }
 }
 
        }
 }
 

-

 /*
  * Parse a roff node's type from the input buffer.  This must be in the
  * form of ".foo xxx" in the usual way.
 /*
  * Parse a roff node's type from the input buffer.  This must be in the
  * form of ".foo xxx" in the usual way.


@@ -582,13 +592,7 @@ roff_parse(struct roff *r, const char *buf, int *pos)
        size_t           maclen;
        enum rofft       t;
 
        size_t           maclen;
        enum rofft       t;
 

-       assert(ROFF_CTL(buf[*pos]));
-       (*pos)++;
-
-       while (' ' == buf[*pos] || '\t' == buf[*pos])
-               (*pos)++;
-
-       if ('\0' == buf[*pos])
+       if ('\0' == buf[*pos] || '"' == buf[*pos])

                return(ROFF_MAX);
 
        mac = buf + *pos;
                return(ROFF_MAX);
 
        mac = buf + *pos;


@@ -598,33 +602,13 @@ roff_parse(struct roff *r, const char *buf, int *pos)
            ? ROFF_USERDEF : roff_hash_find(mac, maclen);
 
        *pos += (int)maclen;
            ? ROFF_USERDEF : roff_hash_find(mac, maclen);
 
        *pos += (int)maclen;

+

        while (buf[*pos] && ' ' == buf[*pos])
                (*pos)++;
 
        return(t);
 }
 
        while (buf[*pos] && ' ' == buf[*pos])
                (*pos)++;
 
        return(t);
 }
 

-
-static int
-roff_parse_nat(const char *buf, unsigned int *res)
-{
-       char            *ep;
-       long             lval;
-
-       errno = 0;
-       lval = strtol(buf, &ep, 10);
-       if (buf[0] == '\0' || *ep != '\0')
-               return(0);
-       if ((errno == ERANGE && 
-                       (lval == LONG_MAX || lval == LONG_MIN)) ||
-                       (lval > INT_MAX || lval < 0))
-               return(0);
-
-       *res = (unsigned int)lval;
-       return(1);
-}
-
-

 /* ARGSUSED */
 static enum rofferr
 roff_cblock(ROFF_ARGS)
 /* ARGSUSED */
 static enum rofferr
 roff_cblock(ROFF_ARGS)


@@ -746,10 +730,10 @@ roff_block(ROFF_ARGS)
                        mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
                            roffs[tok].name);
 
                        mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
                            roffs[tok].name);
 

-               while ((*bufp)[pos] && ' ' != (*bufp)[pos])
+               while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))

                        pos++;
 
                        pos++;
 

-               while (' ' == (*bufp)[pos])
+               while (isspace((unsigned char)(*bufp)[pos]))

                        (*bufp)[pos++] = '\0';
        }
 
                        (*bufp)[pos++] = '\0';
        }
 


@@ -770,9 +754,7 @@ roff_block(ROFF_ARGS)
        /* If present, process the custom end-of-line marker. */
 
        sv = pos;
        /* If present, process the custom end-of-line marker. */
 
        sv = pos;

-       while ((*bufp)[pos] &&
-                       ' ' != (*bufp)[pos] && 
-                       '\t' != (*bufp)[pos])
+       while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))

                pos++;
 
        /*
                pos++;
 
        /*


@@ -816,11 +798,7 @@ roff_block_sub(ROFF_ARGS)
         */
 
        if (r->last->end) {
         */
 
        if (r->last->end) {

-               i = pos + 1;
-               while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
-                       i++;
-
-               for (j = 0; r->last->end[j]; j++, i++)
+               for (i = pos, j = 0; r->last->end[j]; j++, i++)

                        if ((*bufp)[i] != r->last->end[j])
                                break;
 
                        if ((*bufp)[i] != r->last->end[j])
                                break;
 


@@ -831,6 +809,10 @@ roff_block_sub(ROFF_ARGS)
                        roffnode_pop(r);
                        roffnode_cleanscope(r);
 
                        roffnode_pop(r);
                        roffnode_cleanscope(r);
 

+                       while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
+                               i++;
+
+                       pos = i;

                        if (ROFF_MAX != roff_parse(r, *bufp, &pos))
                                return(ROFF_RERUN);
                        return(ROFF_IGN);
                        if (ROFF_MAX != roff_parse(r, *bufp, &pos))
                                return(ROFF_RERUN);
                        return(ROFF_IGN);


@@ -842,7 +824,6 @@ roff_block_sub(ROFF_ARGS)
         * pulling it out of the hashtable.
         */
 
         * pulling it out of the hashtable.
         */
 

-       ppos = pos;

        t = roff_parse(r, *bufp, &pos);
 
        /*
        t = roff_parse(r, *bufp, &pos);
 
        /*


@@ -879,22 +860,29 @@ roff_cond_sub(ROFF_ARGS)
 {
        enum rofft       t;
        enum roffrule    rr;
 {
        enum rofft       t;
        enum roffrule    rr;

+       char            *ep;

 
 

-       ppos = pos;

        rr = r->last->rule;
        rr = r->last->rule;

+       roffnode_cleanscope(r);

 
 

-       /* 
-        * Clean out scope.  If we've closed ourselves, then don't
-        * continue. 
+       /*
+        * If the macro is unknown, first check if it contains a closing
+        * delimiter `\}'.  If it does, close out our scope and return
+        * the currently-scoped rule (ignore or continue).  Else, drop
+        * into the currently-scoped rule.

         */
 
         */
 

-       roffnode_cleanscope(r);
-

        if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {
        if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {

-               if ('\\' == (*bufp)[pos] && '}' == (*bufp)[pos + 1])
-                       return(roff_ccond
-                               (r, ROFF_ccond, bufp, szp,
-                                ln, pos, pos + 2, offs));
+               ep = &(*bufp)[pos];
+               for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
+                       ep++;
+                       if ('}' != *ep)
+                               continue;
+                       *ep = '&';
+                       roff_ccond(r, ROFF_ccond, bufp, szp, 
+                                       ln, pos, pos + 2, offs);
+                       break;
+               }

                return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
        }
 
                return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
        }
 


@@ -903,6 +891,7 @@ roff_cond_sub(ROFF_ARGS)
         * if they're either structurally required (such as loops and
         * conditionals) or a closing macro.
         */
         * if they're either structurally required (such as loops and
         * conditionals) or a closing macro.
         */

+

        if (ROFFRULE_DENY == rr)
                if ( ! (ROFFMAC_STRUCT & roffs[t].flags))
                        if (ROFF_ccond != t)
        if (ROFFRULE_DENY == rr)
                if ( ! (ROFFMAC_STRUCT & roffs[t].flags))
                        if (ROFF_ccond != t)


@@ -913,37 +902,28 @@ roff_cond_sub(ROFF_ARGS)
                                ln, ppos, pos, offs));
 }
 
                                ln, ppos, pos, offs));
 }
 

-

 /* ARGSUSED */
 static enum rofferr
 roff_cond_text(ROFF_ARGS)
 {
 /* ARGSUSED */
 static enum rofferr
 roff_cond_text(ROFF_ARGS)
 {

-       char            *ep, *st;
+       char            *ep;

        enum roffrule    rr;
 
        rr = r->last->rule;
        enum roffrule    rr;
 
        rr = r->last->rule;

+       roffnode_cleanscope(r);

 
 

-       /*
-        * We display the value of the text if out current evaluation
-        * scope permits us to do so.
-        */
-
-       /* FIXME: use roff_ccond? */
-
-       st = &(*bufp)[pos];
-       if (NULL == (ep = strstr(st, "\\}"))) {
-               roffnode_cleanscope(r);
-               return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+       ep = &(*bufp)[pos];
+       for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
+               ep++;
+               if ('}' != *ep)
+                       continue;
+               *ep = '&';
+               roff_ccond(r, ROFF_ccond, bufp, szp, 
+                               ln, pos, pos + 2, offs);

        }
        }

-
-       if (ep == st || (ep > st && '\\' != *(ep - 1)))
-               roffnode_pop(r);
-
-       roffnode_cleanscope(r);

        return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
 }
 
        return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
 }
 

-

 static enum roffrule
 roff_evalcond(const char *v, int *pos)
 {
 static enum roffrule
 roff_evalcond(const char *v, int *pos)
 {


@@ -986,29 +966,20 @@ roff_cond(ROFF_ARGS)
        int              sv;
        enum roffrule    rule;
 
        int              sv;
        enum roffrule    rule;
 

-       /* Stack overflow! */
-
-       if (ROFF_ie == tok && r->rstackpos == RSTACK_MAX - 1) {
-               mandoc_msg(MANDOCERR_MEM, r->parse, ln, ppos, NULL);
-               return(ROFF_ERR);
-       }
-
-       /* First, evaluate the conditional. */
+       /* 
+        * An `.el' has no conditional body: it will consume the value
+        * of the current rstack entry set in prior `ie' calls or
+        * defaults to DENY.  
+        *
+        * If we're not an `el', however, then evaluate the conditional.
+        */

 
 

-       if (ROFF_el == tok) {
-               /* 
-                * An `.el' will get the value of the current rstack
-                * entry set in prior `ie' calls or defaults to DENY.
-                */
-               if (r->rstackpos < 0)
-                       rule = ROFFRULE_DENY;
-               else
-                       rule = r->rstack[r->rstackpos];
-       } else
-               rule = roff_evalcond(*bufp, &pos);
+       rule = ROFF_el == tok ?
+               (r->rstackpos < 0 ? 
+                ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
+               roff_evalcond(*bufp, &pos);

 
        sv = pos;
 
        sv = pos;

-

        while (' ' == (*bufp)[pos])
                pos++;
 
        while (' ' == (*bufp)[pos])
                pos++;
 


@@ -1028,16 +999,20 @@ roff_cond(ROFF_ARGS)
 
        r->last->rule = rule;
 
 
        r->last->rule = rule;
 

+       /*
+        * An if-else will put the NEGATION of the current evaluated
+        * conditional into the stack of rules.
+        */
+

        if (ROFF_ie == tok) {
        if (ROFF_ie == tok) {

-               /*
-                * An if-else will put the NEGATION of the current
-                * evaluated conditional into the stack.
-                */
-               r->rstackpos++;
-               if (ROFFRULE_DENY == r->last->rule)
-                       r->rstack[r->rstackpos] = ROFFRULE_ALLOW;
-               else
-                       r->rstack[r->rstackpos] = ROFFRULE_DENY;
+               if (r->rstackpos == RSTACK_MAX - 1) {
+                       mandoc_msg(MANDOCERR_MEM, 
+                               r->parse, ln, ppos, NULL);
+                       return(ROFF_ERR);
+               }
+               r->rstack[++r->rstackpos] = 
+                       ROFFRULE_DENY == r->last->rule ?
+                       ROFFRULE_ALLOW : ROFFRULE_DENY;

        }
 
        /* If the parent has false as its rule, then so do we. */
        }
 
        /* If the parent has false as its rule, then so do we. */


@@ -1110,6 +1085,7 @@ roff_nr(ROFF_ARGS)
 {
        const char      *key;
        char            *val;
 {
        const char      *key;
        char            *val;

+       int              iv;

        struct reg      *rg;
 
        val = *bufp + pos;
        struct reg      *rg;
 
        val = *bufp + pos;


@@ -1118,8 +1094,10 @@ roff_nr(ROFF_ARGS)
 
        if (0 == strcmp(key, "nS")) {
                rg[(int)REG_nS].set = 1;
 
        if (0 == strcmp(key, "nS")) {
                rg[(int)REG_nS].set = 1;

-               if ( ! roff_parse_nat(val, &rg[(int)REG_nS].v.u))
-                       rg[(int)REG_nS].v.u = 0;
+               if ((iv = mandoc_strntou(val, strlen(val), 10)) >= 0)
+                       rg[REG_nS].v.u = (unsigned)iv;
+               else
+                       rg[(int)REG_nS].v.u = 0u;

        }
 
        return(ROFF_IGN);
        }
 
        return(ROFF_IGN);